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2001年春对红富士苹果柱头与胚囊发育的全过程,以及各阶段所对应的物候期特征进特了观察研究,结果表明:红富士苹果花期从4月24日开始至5月1日结束,共8d,但花的开放集中在前4d,同一花序的开放顺序是中心花先开,1.5d以后第1、2朵边花相继开放,第3、4朵边花与中心花开放相隔2～3d。花发育到大蕾期柱头开始分泌粘液,此时胚囊发育到八核胚囊。开花1～2d,柱头由嫩黄绿色经嫩黄色到黄色,至此胚囊已完全发育成熟,具有授粉受精能力,为该品种的最佳授粉期。开花后5d,花朵失去授粉受精能力。
In the spring of 2001, the whole process of stigma and embryo sac development of Red Fuji apple and the corresponding phenophase characteristics were observed and studied. The results showed that the flowering period of Red Fuji apple began from April 24 to May 1, A total of 8d, but the flowers are concentrated in the first 4d open, the same inflorescence of the order of opening is the first flower, after the first 1.5d after 1.5d flowers have been open, the first 3,4 flowers and center flowers open 2 ~ 3d. The flower develops into large buds stigma begins to secrete mucus, at which point the embryo sac develops to the octoploat embryo sac. Flowering 1 ~ 2d, stigma from bright yellow green through yellow to yellow, thus the embryo sac has fully developed, with the ability of pollination and fertilization, the best pollination of the species. 5d after flowering, the flower loses its ability of pollination and fertilization.